package cc.openhome;

public class StackTraceDemo3 {
    public static void main(String[] args) {
        try {
            c();
        } catch(NullPointerException ex) {
            ex.printStackTrace();
        }
    }
    
    static void c() {
        try {
            b();
        } catch(NullPointerException ex) {
            ex.printStackTrace();
            Throwble t = ex.fillInStackTrace();
            throw (NullPointerException) t;
        }
    }
     static void b() {
         a();
     }
     
     static String a() {
         String text = null;
         return text.toUpperCase();
     }
}